Microsoft Windows SMB Information Disclosure Vulnerability

MEDIUM 6.5EXPLOITED (CISA KEV)CVE-2019-0703 · Published 09/04/2019 · updated 17/06/2026

Microsoft Windows SMB Information Disclosure Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 23/05/2022. Patch affected systems as an emergency.

Package	Affected versions	Patched versions
Windows Microsoft	Versions not published yet (product named by CISA KEV)

Description

An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, aka 'Windows SMB Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2019-0704, CVE-2019-0821.

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0703 · Patch
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2019-0703

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